Multiple Choice QuestionsPhotorespiration is favoured by
high O2 and low CO2
high CO2 and low O2
high temperature and low O2
high humidity and temperature
A.
high O2 and low CO2
Photorespiration is a respiratory process in many higher plants by which they take up oxygen in the light and give out some carbon- dioxide.
Oxygen is a competitive inhibitor of CO2 fixation. Increase in O2 concentration would favour the uptake of oxygen by Rubisco leading to increase in photorespiration.
The true statement about 'green-house effect' is that it is
caused only by CO2
caused by CO2, CFCs, CH4 and NO2 gases
caused by combination of many gases
none of the above
Cochineal insects have proved very useful for
rodents control
Parthenium control
cactus prevention
Eicchornia prevention
The formation of canal system in sponges is due to
reproduction
porous walls
folding of inner walls
gastro- vascular system
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